Suction air-strainer.



A. ENGLAND.

UGTON AB. STRAIN APPLIGATIMI FILED JUL? 1, 19o?.

entran sri/iras raranr onirica.

ALEXANDER ENGLAND, OF VILKINSBURG, PENNSYL-ANIA, ASSIGNOR T0 THE,"WESTING-HOUSE AIR BRAKE COMPANY, OF ITTSBURG, PENNSYLVANIA, A CORPORATIONVOF PENNSYLVANIA.

Specification of Letters Patent.

suoriolv ana-sTnArNER.

Patented Mar. 7, 1911.

To all who/m it may concern:

Be it known that l, ALEXANDER ENGLAND, a citizen of the United States,residing at Vilkinsburg, in the county of Allegheny and State ofPennsylvania, have invented new and. useful lniprovcmentsin Suction Air-Straiiiers, of which the following is a specification.

This invention relates to suction air strainers for air compressors, andparticularly air compressors as applied to steaiii rail-way and electrictraction n id pressure brake equipnients.

Suction air straincrs, as ordinarily constructed, have the air suctioninlet exposed to the weather, so that the saine is liable to b econ'ieclogged with ice or snow, thus interfering with thesupply of air `to thecompres sor. It has been proposed to provide a pro tecting cap adaptedto envelop the suction provide an improved device of the abovecharacter, wherein the filter material presents a large air inletsurface, and which is compact, easily constructed and ot ew parts.

ln the accompanying drawings, Figure l is a longitudinal sectional viewof one forni of niy invention taken substantially on line o o of Fig. 2,and Fig. 2 a transverse sectional vlew taken on line Mh of lig. l.

According tothe forni ol' niy invention shown in the drawing, a casing 1is provided, the outer end of which closed, forining an air chamber 2 tocontain the air suction inlet. For tlii's purpose, a nut 3 may beprovided within the casing l, near its closed 40 end, which may be heldin position by integral webs 4 ,connected to the casing l. An airsuction pipe 5, for supplying air to the compressor, has screw threadedengagement with the nuti Filter material G, which may lbe curled hair orother' suitable material, is

preferably arranged within the easing and located rearward of the mouthof said inlet pipe `5. The filter' material is held in placetransversely by an upper ring -7 of perorated sheet brass or othertoraminous material, permitting air flow therethrough, and

may be heldin place by ledge-s 8 projecting` inwardly from the walls ofthe casing and the webs 4.1- A lower ring 9 of sheet metal, to hold thelter niaterialrin place, is secured by screws l0 to lugs 11 projectinginwardly from the casing. Longitudinally, the tilter material ismaintained' in place by a preferably tapering cylinder l2 of perforatedsheet brass or other foraminous material, and inay be secured in placeby the lower ring 9. By this construction a longitudinal air chamber is`formed, thereby presenting a large suction inlet surface of the filterma* terial.

t will now be apparent that by my construction a casing of smalldiameter may be employed, while permitting a large `flow of airtherethrough. r

l'lriving now described niy invention, what l claini as new and desireto secure by Letters latcnt is i i. in air strainer for air compressors,comprising a casing having a closed end adjacent the suction inlet andthe opposite end open to the atmosphere, lter material containedtherein, and a centrally arranged annular passage from which air isdrawn through the filter material to the suction inlet.

2. An air strainer for air compress "s, comprising a casing having aclosed end orniing an air chamber about the suction inlet and theopposite end open to the atmosphere, iilter material arranged lengthwisein said casing, rearward of said suction inlet and having an annularlongitudinallyarranged passage from which air is drawn through theiilter material.

:3. An air strainer for air" compressors, comprising a casing having aclosed end forming an air chamber about the suction inlet, liltermaterial arranged lengthwise in said casing, rearward of said suct'onvinlet and a cone of foraminous material or holding the filter materialin place and forming a centrally arranged air chamber, communif eatingwith the atmosphere.

it. An air strainer for air compressors comprising a suction pipe, acap'member verte/d over and secured to the inlet end of said pipe,thereby forming an air chamber ico to4 the atmosphere, lter materialarranged in said gap member, and a, retaining wall f 5 foraminieusmaterial for seid filter material through whieh air is taken from theatmos-A 4 phere.'

In testimony whereof I have hereunto set rrly hand.

, ALEXANDER ENGLAND.

vV-Vtesse's:y

R. F. -EMERY, A

WM, ML CADY.

